What is the best free online pokemon game?

I seem to get a lot of comments asking "what's the best free online Pokemon game", "what's a great online Pokemon game", "what online Pokemon MMORPG is the best to play" ... stuff like that.
To be honest I have played a whole heap of them and they are are kind of the same, they most be or they would not be a Pokemon game. What sets the good games and bad games apart is the small things that make a huge difference - things like speed of the site, how often the servers are offline, how many members play. Like all games, the littles things matter.

The best of the best free online Pokemon was / is Pokemon Crater
But there are plenty of others to try out, just go through this site and I am sure you will find one.
Here are a couple to read about . Pokemon Indigo and Pokemon Mystery Dungeon online MMORPG

Some Pokemon games have not been updated for ages but are still playable other games are updated but are not quite good enough still. I know the games are free and made by fans but you still want one that is fun to play, fast, and has enough online players to play against. Enjoy.